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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">izmertech</journal-id><journal-title-group><journal-title xml:lang="ru">Измерительная техника</journal-title><trans-title-group xml:lang="en"><trans-title>Izmeritel`naya Tekhnika</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0368-1025</issn><issn pub-type="epub">2949-5237</issn><publisher><publisher-name>ФГУП "ВНИИФТРИ"</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">izmertech-352</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ИЗМЕРЕНИЯ ВРЕМЕНИ И ЧАСТОТЫ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>TIME AND FREQUENCY MEASUREMENTS</subject></subj-group></article-categories><title-group><article-title>Бюджет неопределённостей цезиевого репера частоты фонтанного типа</article-title><trans-title-group xml:lang="en"><trans-title></trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Блинов</surname><given-names>И. Ю.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бойко</surname><given-names>А. И.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Домнин</surname><given-names>Ю. С.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Костромин</surname><given-names>В. П.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Купалова</surname><given-names>О. В.</given-names></name></name-alternatives><email xlink:type="simple">kupalova_ov@vniiftri.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Купалов</surname><given-names>Д. С.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>Всероссийский научно-исследовательский институт физико-технических и радиотехнических измерений</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>07</day><month>02</month><year>2023</year></pub-date><volume>0</volume><issue>1</issue><fpage>23</fpage><lpage>27</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; ФГУП "ВНИИФТРИ", 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">ФГУП "ВНИИФТРИ"</copyright-holder><copyright-holder xml:lang="en">ФГУП "ВНИИФТРИ"</copyright-holder><license xlink:href="https://www.izmt.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://www.izmt.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://www.izmt.ru/jour/article/view/352">https://www.izmt.ru/jour/article/view/352</self-uri><abstract><p>Описаны конструкция и режим работы цезиевого репера частоты фонтанного типа CSFO2(SU), разработанного и изготовленного во ВНИИФТРИ. Приведены результаты метрологических исследований, которые позволили более точно оценить систематические сдвиги частоты репера и уточнить оценку неисключённой систематической погрешности цезиевого репера частоты фонтанного типа CSF02(SU), оцениваемой значением порядка 2,5·10-16.</p></abstract><trans-abstract xml:lang="en"><p>In the paper the design and operation mode of the CsFO2(SU) fountain-type cesium frequency standard developed at the All-Russia Research Institute of Physicotechnical and Radio Measurements(VNIIFTRI) are presented. The evaluation procedure for the systematic frequency shifts and corresponding uncertainties are shown. Currently the frequency uncertainty (type B) of CsFO2 is 2,5·10-16.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>атомные часы</kwd><kwd>цезиевый репер фонтанного типа</kwd><kwd>холодные атомы</kwd><kwd>atomic clock</kwd><kwd>fountain-type cesium frequency standard</kwd><kwd>cold atoms</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Clairon A., Salomon C., Guellati S. Phillips W. D. Ramsey resonance in a Zacharias fountain // Europhys. Lett. 1991. No. 16. P. 165-170.</mixed-citation><mixed-citation xml:lang="en">Clairon A., Salomon C., Guellati S. Phillips W. D. Ramsey resonance in a Zacharias fountain // Europhys. Lett. 1991. No. 16. P. 165-170.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Levi F., Calonico D., Claudio E. Calosso, Godone A., Micalizio S., Costanzo A G. 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